Wireless Wakeups Revisited: Energy Management for VoIP Over Wi-Fi Smartphones
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Overview: Voice-over-IP (VoIP) services are rapidly gaining acceptance over traditional circuit-switched voice communication networks such as the Public Switched Telephone Network (PSTN). Although there are many reasons behind this transformation, the two most compelling reasons are lower costs, and new functionality that is difficult to achieve with traditional voice networks. In homes, providers such as Vonage and SunRocket provide very low cost long-distance and international calling services. Skype provides free calling to other Skype users and only charges for calls to users outside the Skype network.